package com.lin.learning.questionmanagement.filter;

import com.alibaba.fastjson.JSON;
import com.lin.learning.questionmanagement.utils.JwtUtil;
import com.lin.learning.questionmanagement.utils.RedisCache;
import com.lin.learning.questionmanagement.utils.WebUtils;
import com.our.learning.infrastructure.constant.AppHttpCodeEnum;
import com.our.learning.infrastructure.po.Teacher;
import com.our.learning.infrastructure.pojo.ResponseResult;
import io.jsonwebtoken.Claims;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.Objects;

@Component
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter {

    @Autowired
    private RedisCache redisCache;

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        //获取请求头中的token
//        String token = request.getHeader("Authorization");
//        if (!StringUtils.hasText(token)){
//            //说明该接口不需要登录 直接放行
//            filterChain.doFilter(request,response);
//            return;
//        }
//        //解析获取userid
//        Claims claims=null;
//        try {
//            claims= JwtUtil.parseJWT(token);
//        } catch (Exception e) {
//            e.printStackTrace();
//            //token超时 非法
//            //告诉前端需要重新登录
//            ResponseResult responseResult = ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
//            WebUtils.renderString(response, JSON.toJSONString(responseResult));
//            return;
//        }
//        //从redis中获取用户信息
//        String userId = claims.getSubject();
//        Teacher loginUser = redisCache.getCacheObject("login:" + userId);
//        //如果获取不到
//        if (Objects.isNull(loginUser)){
//            //说明登录过期 提示重新登录 和上面的提示一样
//            ResponseResult responseResult = ResponseResult.errorResult(AppHttpCodeEnum.NEED_LOGIN);
//            WebUtils.renderString(response, JSON.toJSONString(responseResult));
//            return;
//        }
//
//        //存入SecurityContextHolder
//        UsernamePasswordAuthenticationToken authenticationToken=new UsernamePasswordAuthenticationToken(loginUser,null,null);
//        SecurityContextHolder.getContext().setAuthentication(authenticationToken);
//        filterChain.doFilter(request,response);
        filterChain.doFilter(request, response);
        return;
    }
}
